05000313/LER-1980-012-03, Emergency Feedwater Supply Valve CV-2667 Failed to Open.Valve Failed Next Day Along W/Emergency Feedwater Supply Valve CV-2617.Caused by Loose Bolts Securing Actuator to Valve

Emergency Feedwater Supply Valve CV-2667 Failed to Open.Valve Failed Next Day Along W/Emergency Feedwater Supply Valve CV-2617.Caused by Loose Bolts Securing Actuator to Valve

ML19340B548
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/07/1980
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19340B543	List:
References
LER-80-012-03X-01, LER-80-12-3X-1, NUDOCS 8011110273
Download: ML19340B548 (1)

LER-1980-012, Emergency Feedwater Supply Valve CV-2667 Failed to Open.Valve Failed Next Day Along W/Emergency Feedwater Supply Valve CV-2617.Caused by Loose Bolts Securing Actuator to Valve

Event date:
Report date:
3131980012R03 - NRC Website

text

REVISED REPORT - PREVIOUS REPORT DATE 5/2/80 PeRC FORM 366 U. S. NUCLE AR REGUL ATORY COMMISSION (7 77)

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EVENT E,ESCRIPTION AP.O P"C8 ABLE CONSEQUENCES QD) ror2i i During normal power operation, while perfonning a monthly inservice valvej io!3i i stroke test, emergency feedwater supply valve, CV-2667, failed to fully i 1o1411 coen on cemand.

The valve was reoaired and declared _op_erable. but failedt ic is t i the following day, along with EFW supply valve, CV-2617.

The redundant i ic is i l EFW flow path was operable in each case.

The occur. 'ce i.e, similar to l

101,It LER 50-313/80-005.

Reportable per T.S. 6.12.3.2.b.

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CAUSE DESCR.PTION AND CC ARECflVE -CTIONS h I, lo I i Aooarent cause was binding.

Valve CV-2667 initiallv had the sten lub-I li li i i ricated and the toroue switch settirds readiu ded.

Cause nf binding was l 1,12 6 LSubsequently identified to be loose bolts securira the actuator to valve I tilall body.

Bolts were orocerly toroved and the torque switch was replaced to I t iis i I insure reliability.

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